Details

Autor(en) / Beteiligte

• Nan, Fan
• Yan, Zijie

Titel

Light‐Driven Self‐Healing of Nanoparticle‐Based Metamolecules

Ist Teil von

• Angewandte Chemie (International ed.), 2019-04, Vol.58 (15), p.4917-4922

Auflage

International ed. in English

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Metamolecules and crystals consisting of nanoscale building blocks offer rich models to study colloidal chemistry, materials science, and photonics. Herein we demonstrate the self‐assembly of colloidal Ag nanoparticles into quasi‐one‐dimensional metamolecules with an intriguing self‐healing ability in a linearly polarized optical field. By investigating the spatial stability of the metamolecules, we found that the origin of self‐healing is the inhomogeneous interparticle electrodynamic interactions enhanced by the formation of unusual nanoparticle dimers, which minimize the free energy of the whole structure. The equilibrium configuration and self‐healing behavior can be further tuned by modifying the electrical double layers surrounding the nanoparticles. Our results reveal a unique route to build self‐healing colloidal structures assembled from simple metal nanoparticles. This approach could potentially lead to reconfigurable plasmonic devices for photonic and sensing applications. A guiding light: Colloidal Ag nanoparticles underwent light‐driven self‐assembly into quasi‐one‐dimensional metamolecules. Specific metamolecules showed self‐healing ability, whereby their structure was restored in a linearly polarized optical field even if they were totally destroyed by perturbations (see picture).